LDE225 (NVP-LDE225) is a potent, selective and orally bioavailable Smoothened (SMO) antagonist that inhibits hedgehog (Hh) signaling pathway via antagonism of the Smoothened receptor (SMO).
ALLO-2 is a potent drug-resistant Smoothened (Smo) mutant antagonist that inhibits Smo agonist Hh-Ag1.5-induced luciferase expression in TM3-Gli-Luc cells with IC50 of 6 nM.